Those arguments which depend upon an expression that is valid of a particular thing, or in a particular respect, or place, or manner, or relation, and not valid absolutely, should be solved by considering the conclusion in relation to its contradictory, to see if any of these things can possibly have happened to it. For it is impossible for contraries and opposites and an affirmative and a negative to belong to the same thing absolutely; there is, however, nothing to prevent each from belonging in a particular respect or relation or manner, or to prevent one of them from belonging in a particular respect and the other absolutely. So that if this one belongs absolutely and that one in a particular respect, there is as yet no refutation. This is a feature one has to find in the conclusion by examining it in comparison with its contradictory.

All arguments of the following kind have this feature: ‘Is it possible for what is-not to be? “No.” But, you see, it is something, despite its not being.’ Likewise also, Being will not be; for it will not he some particular form of being. Is it possible for the same man at the same time to be a keeper and a breaker of his oath?’ ‘Can the same man at the same time both obey and disobey the same man?’ Or isn’t it the case that being something in particular and Being are not the same? On the other hand, Not-being, even if it be something, need not also have absolute ‘being’ as well. Nor if a man keeps his oath in this particular instance or in this particular respect, is he bound also to be a keeper of oaths absolutely, but he who swears that he will break his oath, and then breaks it, keeps this particular oath only; he is not a keeper of his oath: nor is the disobedient man ‘obedient’, though he obeys one particular command. The argument is similar, also, as regards the problem whether the same man can at the same time say what is both false and true: but it appears to be a troublesome question because it is not easy to see in which of the two connexions the word ‘absolutely’ is to be rendered-with ‘true’ or with ‘false’. There is, however, nothing to prevent it from being false absolutely, though true in some particular respect or relation, i.e. being true in some things, though not ‘true’ absolutely. Likewise also in cases of some particular relation and place and time. For all arguments of the following kind depend upon this.’ Is health, or wealth, a good thing?’ ‘Yes.’ ‘But to the fool who does not use it aright it is not a good thing: therefore it is both good and not good.’ ‘Is hea............